devextreme/renovation/ui/scroll_view/utils/normalize_offset_left.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (renovation/ui/scroll_view/utils/normalize_offset_left.js)
 * Version: 21.2.4
 * Build date: Mon Dec 06 2021
 *
 * Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
exports.getScrollSign = getScrollSign;
exports.normalizeOffsetLeft = normalizeOffsetLeft;
var _scroll_rtl_behavior = _interopRequireDefault(require("../../../../core/utils/scroll_rtl_behavior"));

function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
        default: obj
    }
}

function isScrollInverted(rtlEnabled) {
    var _getScrollRtlBehavior = (0, _scroll_rtl_behavior.default)(),
        decreasing = _getScrollRtlBehavior.decreasing,
        positive = _getScrollRtlBehavior.positive;
    return rtlEnabled && decreasing !== positive
}

function getScrollSign(rtlEnabled) {
    return isScrollInverted(rtlEnabled) && (0, _scroll_rtl_behavior.default)().positive ? -1 : 1
}

function normalizeOffsetLeft(scrollLeft, maxLeftOffset, rtlEnabled) {
    if (isScrollInverted(rtlEnabled)) {
        if ((0, _scroll_rtl_behavior.default)().positive) {
            return maxLeftOffset - scrollLeft
        }
        return maxLeftOffset + scrollLeft
    }
    return scrollLeft
}